Re: 2.6.21-rc4-mm1

[Pavel Machek <pavel@ucw.cz>]

Hi!

> > Andrew Morton napsal(a):
> > >   http://userweb.kernel.org/~akpm/2.6.21-rc4-mm1/
> > 
> > I'm getting this while trying to swsusp:
> > Stopping tasks ...
> > Stopping kernel threads timed out after 20 seconds (1 tasks refusing to freeze):
> >  swapper
> >  Restarting tasks ... done.
> > 
> > What to test? Enable PM_DEBUG?

Is it repeatable? Freezer normally works better than that.

> hm, OK.  Rafael has been working on fixing the process freezer and it'll
> take some time to get it to where we want it to be, I expect.

> Rafael, I think that we could afford to add heaps of debug in there at this
> stage to help us track down problems like this.
> 
> Also, it might be useful to add a temporary /proc/freeze-unfreeze thing
> which will simply do a freeze/unfreeze cycle.  Then we can apply various
> workloads to the machine while madly stressing the freezer code.  

echo testproc > /sys/power/disk; echo disk > /sys/power/state ... is
pretty much what you want.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html